CR-MM-1-0-00
PS-28 Cruiser
PS-28N Cruiser
CHAPTER 15 – AIRPLANE REPAIRS
Date of issue: 2011-03-08
Revision No.: -
15 - 15
CAUTION:
THESE AGENTS MUST NOT BE USED FOR DEGREASING PARTS FROM
PLASTICS (PC -LEXAN, PMMA PLEXIGLASS).
(b)
Water-based agents
- emulgation substances, wetting agents
•
Applied also by spraying onto washed surfaces or by wiping with wet (by pouring
and dipping) textile wad. After applying it, let it act for some time (see manufacturers
recommendation) and then it is rinsed with clear water (by means of sponge dipped
in ample amount of water or water jet).
•
Advantages
: (different according to the type of product: it is possible to highly dilute
with water (cheap); ecological - waste (including dripping from the surface due to
ample amount of water it is necessary to contain it) can be generally eliminated
after its additional dilution with water in public sewerage; the least detrimental to
health.
•
Disadvantages
: slow and unreliable evaporating from corners and borders,
additional warming (drying) mostly required imperfect elimination of water results
in wrong adhesion of paint coats; imperfect degreasing of fiberglass parts (not
possible to use)
•
Use
: for Al-alloys surfaces and plastics
15.6.2.2
Bonding rivet heads, big irregularities and material transitions
CAUTION:
IN CASE THAT AIRPLANE SURFACE REMAINS WITHOUT TOP COAT,
CARRY OUT JUST RIVET HEAD BONDING.
After perfect degreasing, carry out bonding of rivet heads, big irregularities and transitions
of fiberglass parts with Al-sheet.
Epoxy and polyester bonding agents for car bodies are suitable; moreover for transitions
between two types of material with increased elasticity. Recommended bonding agents are
shown in the Tab. 15-5.
Polyester bonding agents are applied with plastic spatula after being mixed with initiator.
Sanding with sanding paper with grain size of 240 is made to smooth surface after drying.
Remove dust after sanding and clean with degreasing agent.
Epoxy bonding agent is applied from the special jet with static mixer by means of extruding
pistol. Excessive material is wiped off with spatula to final appearance before setting (slight
recess is not a defect) -
do not sand!
Surface
Manufacturer,
name
Type
Other
components
Drying (grindable)
[min] / 18°C (65°F)
Al-alloys
BASF Glasurit
801-703 (base)
polyester
BASF Glasurit
965-53 (initiator)
20
Transitions
epoxide – fiberglass
+ Al-alloys
BASF Glasurit
801-703 (base)
polyester
BASF Glasurit
965-53 (initiator)
20
Rivet heads
BASF Glasurit
polyester
+ styren
20
Tab. 15-4
: Recommended bonding agents